Gas cock



AIR. TALLMAN.

' GA'S COCK.

APPLICATION FILED FEB. 2, 1921.

Patented Nov. 28, 1922.

Patented Nov. 28, 1922.

UNITED STATES PATENT OFFICE.

ALBERT ROMAINE TALLMAN, 0E NASHVILLE, TENNESSEE, .ASSIGNOR OF ONE-FOURTHTO HERBERT HARSH, ONE-FOURTH TO ROBERT L. LEWIS, AND ONE-FOURTH TO NANCYT. LEWIS, ALL OF NASHVILLE, TENNESSEE.

G AS COCK.

of this application is a gas cook of that general type wherein a plungerand a latch are mounted for reciprocation in a rotatable valve, theplunger constituting means for actuating the latch, and the latchcoacting with the casing of the valve, to limit the rotation of thevalve. 4

One object of the invention is to provide novel means for interengagingthe plunger with the latch in such a vwagy that there will be no lostmotion between the plunger and the latch, the plunger constituting meansfor advancing the latch when the plunger is thrust in one direction, andconstituting means for retracting the latch, when the plunger is movedin an opposite direction, adequate bearing surfaces be.- tween theplunger and the latch being provided, to the end that the device may beadapted well to withstand wear.

A further object of the invention is to provide novel means forcontrolling the spring which operates the plunger.

It is within the province of the disclosure to improve generally and-toenhance the utility of devices of that type to which the inventionappertains.

With the above and other objects in view, which will appear as thedescription proceeds, the invention resides in' the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that, within the scope ofwhat is claimed, changes in the precise embodiment of the inventionshown can be made withoutdeparting from the spirit of the invention. Y

In the accompanying drawingsz- Figure 1 shows in side elevation, adevice constructed in accordance with the invention; Figure 2 is anelevation wherein the Application filed February 2, 1921. Serial N 0.441,832.

structure is viewed at right angles to the showing of .Figure 1; Figure3 is a fragmental section wherein parts appear in elevation; Figure 4 isa section taken through the valve and attendant parts, the cutting planein Figure 4 being at right angles to the cutting plane in Figure 3;Figure 5 is a transverse section taken through the valve and the valvecasing; and Figure 6 is a composite perspective view delineating aportion of the plunger, and the latch.

The numeral 1 marks a casing having an inlet 2 and an outlet 3. A valve4 isjournaled in the casing 1 and includes a tip 6 whereon a washer 7 ismounted, the washer abutting against one end of the casing 1. A screw 8is threaded into the tip 6 and carries a washer 9. A compression spring10 surrounds the tip 6 and abuts against the washers 9 and 7. The valve4 is of conical form, and the spring 10 constitutes means for holdingthe .valve seated. The

valve 4 comprises 'a stem 11 having a laterplied with a pin orprojection 21, located in the notch 18 and adapted to coact with the stos 19 and 20.

n actuating member in the form of a plunger 22 is mounted to reciprocatein the bore 14 of the valve 4. The plunger 22 has a button 23, at oneend, fitting slidably in the bore, 14, the plunger being provided at itsinner end with a foot 24, likewise slidable in the bore 14. The plunger22 slides in a washer 25 located in the bore 14. -A compression spring26 surrounds a portion of the plunger 22 and abuts against the washer25' and the button 23. A detent 27 in the form of a pin, is mountedremovably in the stem 11 of the valve 4 and extends transversely of thestem. The pin 27 passes across the bore 14 and supports the washer 25.The plunger 22 has a flat side 28. The pin 27 exercises a three-foldoffice. First, it receives the thrust of the spring 26, since the pinsupports the washer 25 whereon the spring bears. Second, the pin 27engages the foot 24, thereby limiting the outward movement of theplunger 22 under the action of the spring 26. Third, the pin 27 engagesthe flat side 28 of the plunger 22 and pre vents the plunger fromrotating.

Interengaging elements are provided, whereby motion may be transmittedfrom the plunger 22 to the latch 30.. These interengaging elementsembody inclined fingers 29 projecting from the foot 24, together withnotches 31 formed in a latch 30, the latch 30 being mounted for rightline reciprocation in the valve 4, transversely of the valve. The latch30 may project into the notch 18 of the valve casing 1. The notches 31of the latch 30 define a thinned neck 32 received between the fingers 29of the plunger. Each notch 31 defines shoulders 33. The notches 31 arecut at an acute angle in the latch 30 to correspond with the slant ofthe fingers 29 with respect to the axis of the plunger 22. The fingers29 substantially fill the notches 31.

that there will be no lost motion between the plunger and the latch,where the flanges 29 are received in the notches 31. Further, theshoulders 33 afi'ord adequate bearing areas for the fingers 29, and tendtov lessen wear. When the plunger 22 is thrust inwardly, the latch 30will be advanced, and when the plunger moves outwardly, the latch willbe retracted,-a positive movement being imparted from the plunger to thelatch and lost moby those skilled in the art. It may be stated,

however, that when the latch 30 engages with the shoulder 20, and whenthe projection 21 engages with the shoulder 19, as,

shown in Flgure 5, the passage 5 in the valve 4 is disposed transverselyof the inlet 2 and the outlet 3, it being impossible for gas to passthrough thecock, the valve being held against rotation. The operator maythrust the plunger 22 inwardly, whereupon the fingers 29' will retractthe latch 30. Then,- the valve 4: may be turned clockwise (Figure 5)until the projection 21 engages the shoulder Each finger 29 bearsagainst both of the shoulders 33, formed by one notch 31. The generalconstruction is such 20, under which circumstances, the passage 5 in thevalve will establish communication between the inlet 2 and the outlet 3.The latch 30, at this time, has been pushed to the right (Figure 5) andis held retracted by contact with the inner surface of the casing 1, thespring 26 being held under compression. As soon as the-valve at has beenrotated in a counter clockwise direction, into the position of Figure 5the latch 30 is released, and moves outwardly into the position ofFigure 5 due to the expansion of the spring 26 and to the action of thefingers 29 of the plunger on the shoulder 33 of the latch 30. 7

Having thus described the invention, what is claimed is 1. In a deviceof the class described, a casing having stops spaced circumferentiallyof the casing; a valve journaled in the casing; a projection carried bythe valve and a latch slidable in the valve, the projection and thelatch cooperating with the stops to hold the valve against rotation, thelatch having oppositely disposed notches each defining shoulders; and aplunger slidable in the valve and including fingers received in thenotches and filling the same, whereby each finger will bear without lostmotion upon; both of the shoulders defined by one notch, thereby toadvance the latch when the plunger is advanced, and to retract the latchslidable in the valve and cooperating with the casing to hold the valveagainst rotation; a plunger comprising a button and a foot slidable inthe valve, the foot and the latch having interengaging elements wherebymotion is transmitted from the plunger to the latch; a springsurrounding the plunger and abutting against the button to retract theplunger; and. a detent in the valve and receiving the'thrust of thespring, when the plunger is advanced, the detent cooperating with thefoot tolimit the retracting movement of the plunger under the impulse ofthe spring.

3. In a device of the class described, a casing; a valve journaled inthe casing; a latch slidable in the valve and cooperating with thecasing to hold the vah'e against rotation; a plunger having a fiat side,the plunger comprising a button and a foot slidable in the valve, thefoot and the latch having interengaging elements whereby motion istransmitted from the plunger to the latch; a washer in the valve, theplunger being slidable in the washer; a spring surrounding the plungerand abutting against the washerand the button, the spring constitutingmeans for retracting the plunger; and a detent mounted in the valve, thedetent coacting with the washer to receive the thrust of the spring,when the plunger is as my own, I have hereto afiixed my signaadvanced,and coacting with the foot, to turnin the presence of two witnesses.limit the retracting movement of the plunger under the action of thespring, the ALBERT ROMAINE TALLMAN' 5 detent engaging the flat side ofthe plunger \Vitnesses:

to hold the plunger against rotation. SONOMA MAsLIN,'

In testimony that I claim the foregoing JOHN E. SooBEY.

